Sinusitis is an inflammation of the sinuses. The sinuses are air-filled cavities located behind the nose, forehead and eyebrows, on either side of the bridge of the nose and within the bony structure of the cheeks. Often caused by a bacterial infection, sinusitis can also be caused by viruses and fungi (molds). People who have allergies, asthma, structural blockages in the nose or sinuses, or people with weak immune systems are at greater risk for developing sinusitis.
Acute sinus disease lasts three to eight weeks. Sinus disease persisting longer than eight weeks is considered chronic. An infection of the sinus cavity close to the brain can be life threatening, if not treated. In rare cases, it can spread to the brain.
Acute sinus disease, molds, structural blockages,Sinusitis